Metal-cutting shears.



K. JOHANSON.

METAL CUTTENG SHEARS.

APPLICATION FILED NOV. 6, 1915.

1 1 74:, l 6 l Patented Mar. 7, 1916.

2 SHEETSSHEET l- JfarZ Johan/van lxliineooeo MBIA PLANOGRAPH c0.,WASHINGTON, D c.

G 5 W070 4 97 flli tozwcgs K. JOHANSON.

METAL CUTT'ING SHEARS.

APPLICATION FILED NOV. 6, 1915.

1,174,16 1. Patented Mar. 7, 1916.

2 SHEETS-SHEET 2.

Fig.5.

WIIIIIIIIIIIIII A VIIIIIIIIII'IIIL gwue'ntoz Icy Z J0me THB COLUMBIAFLAIIVOGRAPH 60., WASHINGTON. n. c.

- sistance of the bolt 15.

can:

KARL J OI-IANSON, OF SAGAMOBE, PENNSYLVANIA, .ASSIGNO'R OF ONE-HALF TOEDWARD JOI-I NSQNQ OF SAGAMORE, PENNSYLVANIA.

METAL-CUTTING siIEARs.

Application filed November 6, 1915.

To all whom it may concern:

Be it known that I, KARL JoHANsoN, a citizen of the United States,residing at Sagamore, in the county of Armstrong and State ofPennsylvania, have invented certain new and useful Improvements inMetal- Cutting Shears, of which the following is a specification.

The present invention relates to improvements in shears for cuttingsheet-metal and is distinguished by being simple in construction andhaving its parts interchangeable and adjustable so that if one or bothof the blades become dull or broken, they may instantly be replaced byspare ones. The upper blade may also be adjusted relatively to the lowerblade, thus providing difierent angularity and gap between them. Lastly,the two shanks may be shifted in and out in order to obtain dilferentleverage.

One embodiment of the invention has been illustrated in the accompanyingdrawings.

Figure 1 shows the shears in perspective view; Fig. 2 a part of theupper shank in perspective view and seen from the back of Fig. 1; Fig. 3a side elevation in larger scale; Fig. 4 a top plan view of Fig. 3; Fig.5 a section along line VV of Fig. 3; Fig. 6 a section along line VIVI ofFig. 3, and, Fig. 7 a section along line VIIVII of Fig. 3.

The two shanks 10, 11 are spread apart in the usual manner by acompression spring 12. The forward extension 13 of the upper shank 10 isrecessed as at 14: in order to accommodate the upwardly-extending arm14: of the lower blade 15 which thus becomes firmly fixed in the uppershank with the as In case of injury to this blade, it may consequentlybe easily and quickly replaced by another one by merely unscrewing thenut and taking out the bolt 15.

The upper shank is provided with a short extension 13' beyond therecessed portion 13, with several holes 21 for accommodating the journalpin 19 and the lower shank 11 has a similar but longer extension 11,with Specification of Letters Patent.

Patented Mar. '7, 1916.

Serial No. 60,009.

several holes 21 for the journal pin 19 which also engages in one of theholes 20 provided in the hinge straps or links 17 held in place by a nutthreaded on the end of the ournal pin 19.

The upper blade 16 is suspended by means of the hinge straps 17, 23. Therear end of the blade 16 has several holes 18 to accommodate the bolt 18which forms the journal for the blade and also runs through the lowerend of the link 17 and through the arm 14. of the lower blade 15.

The forward hinge straps 23 of which there are a pair are journaled atthe end of the extension 11 by means of a bolt 22 and another bolt 24connects the straps 23 to the upper blade 16.

By shifting the bolts 18, 19 from one set to another of the holes 18,20, 21 and 21, the adjustment of the blades and of the shanks isaccomplished.

I claim:

1. In two-bladed shears, a shank having a recessed portion for receivingand rigidly holding one of the blades, an extension beyond said recessedportion on which the second shank is journaled, link connection betweensaid extension and the rear end of the second blade, said connectionbeing adjustable; said second shank extending forward of its journalpoint, and another link connection between the forward ends of thesecond blade and the second shank.

2. In two-bladed shears, a shank having a recessed portion for receivingand rigidly holding one of the blades, an extension beyond said recessedportion on which the second shank is journaled, link connection betweensaid extension and the rear end of the second blade,said connectionbeing adjustable; said second shank extending forward of its journalpoint, another link connection between the forward ends of the secondblade and the second shank, and means for adjusting the position of saidsecond blade.

V 3. In two-bladed shears, a shank having a recessed portion forreceiving and rigidly holding one of the blades, an extension benectionbetween the forward ends of the yond said recessed portion .on which thesecond blade and the second shank, and second shank is journaled, linkconnection means for adjusting the position of said 10 between saidextension and the rearend of second shank.

5 the second blade, said connection being ad- In testimony whereof Iaflix my signature.

justable; said second shank extending forward of its journal point,another link con- KARL J OHANSON.

Copies 01? this patent may be obtained for five cents each, byaddressing the Commissioner of Patents, Washington, D. G.

